(Senior) IoT Hardware Engineer (m/f/d)

We are looking for you as an addition to our tech-team in Berlin, Munich or Hamburg. 1KOMMA5° is building Germany's largest one-stop-shop for sale, installation and services related to solar, heat pumps, electricity and charging infrastructure. And they are all connected! Be a part of our mission!

Become a part of our mission and learn more about our Product & Tech team!

At 1KOMMA5°, we connect and manage distributed energy devices at scale. As an IoT Hardware Engineer, you will play a central role in the definition, evolution, and lifecycle management of our 1K5 Heartbeat Gateway hardware, the edge device that securely connects thousands of energy assets to our cloud ecosystem.

You will be the primary hardware owner within the team, being responsible for the gateway’s hardware architecture end-to-end while closely coordinating with developers, supply chain team, and certification partners. Working at the intersection of electronics design, embedded engineering, manufacturing, and compliance, you will ensure that our gateway hardware is reliable, scalable, cost-effective, andevolved at scale.

Your work will directly impact the robustness, longevity, and regulatory readiness of the distributed energy infrastructure we deploy at scale.

Key responsibilities include but are not limited to:

• Own the hardware architecture of our IoT gateway, from concept and component selection through production and lifecycle management

• Work closely together with the product manager to define system-level requirements covering performance, reliability, security, manufacturability, and cost

• Act as the main interface between hardware, embedded software, and manufacturing, ensuring tight alignment across disciplines

• Oversee board-level validation, debugging, and failure analysis during prototyping, pilot runs, and field operation

• Define and support hardware test strategies for production, including manufacturing flashing processes

• Drive hardware-related certification activities (e.g. CE, EMC, safety, radio), working with external labs and internal stakeholders

• Support secure hardware foundations, including secure boot enablement in collaboration with embedded software colleagues

• Manage hardware revisions, BOM management, and supply-chain constraints over the product lifecycle

Technologies you will work with include:

• Embedded hardware (e.g. SoCs, compute modules, secure elements)

• Electronic Design Automation (EDA)  tools, BOM management

• Manufacturing processes: prototyping, assembly, flashing, and testing

• Certification workflows: CE, EMC, safety, radio, environmental regulations

• Close collaboration with embedded Linux and IoT software stacks

The successful candidate will have:

• Bachelor’s or Master’s degree in Electrical Engineering, Electronics Engineering, or a related field

• 5+ years of experience in hardware engineering for embedded or IoT systems

• Proven experience owning hardware designs from specification through production

• Strong experience coordinating and technically steering external hardware development partners

• Solid understanding of embedded systems constraints and hardware–software interaction

• Hands-on experience with hardware validation, debugging, and root-cause analysis

• Practical exposure to certification processes and working with external test labs

• Familiarity with manufacturing processes, production testing, and supply-chain considerations

• Ability to work autonomously as the hardware specialist within a cross-functional team

• Strong analytical skills and a structured, detail-oriented working style

• Clear and effective communicator in English (German is a plus)

Bonus points for:

• Previous work on energy-related hardware

• Prior involvement in field-return analysis and systematic hardware root-cause investigations

• Experience contributing to cross-functional architectural decisions beyond a single discipline

• Passion for climate tech and distributed energy systems

We are an ambitious and dynamic company with a talented team. We require our engineers to be imaginative, enthusiastic, and willing to tackle new challenges as we strive to provide everyone with renewable energy technologies.

• You are part of a dynamic team with people who prove every day that they can make things happen and move companies forward with great positive impact

• You move in flat hierarchies and have short decision-making paths. You can learn a lot quickly and get involved at different levels

• You will be welcomed by a friendly and familiar team

• You are part of the energy transition and recognize in your daily work what purpose it serves

• You can work in one of our offices in Hamburg, Berlin or Munich

• You create a healthy balance alongside your work and enjoy all the benefits of the EGYM Wellpass

• Benefits and discounts are yours with Futurebens

• Whether city bike or e-bike - be flexible with our job bike leasing and do something good for the environment at the same time